| #ifndef _ASM_X86_PGTABLE_H |
| #define _ASM_X86_PGTABLE_H |
| |
| #define FIRST_USER_ADDRESS 0 |
| |
| #define _PAGE_BIT_PRESENT 0 /* is present */ |
| #define _PAGE_BIT_RW 1 /* writeable */ |
| #define _PAGE_BIT_USER 2 /* userspace addressable */ |
| #define _PAGE_BIT_PWT 3 /* page write through */ |
| #define _PAGE_BIT_PCD 4 /* page cache disabled */ |
| #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ |
| #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ |
| #define _PAGE_BIT_FILE 6 |
| #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
| #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
| #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ |
| #define _PAGE_BIT_UNUSED2 10 |
| #define _PAGE_BIT_UNUSED3 11 |
| #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
| #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| |
| /* |
| * Note: we use _AC(1, L) instead of _AC(1, UL) so that we get a |
| * sign-extended value on 32-bit with all 1's in the upper word, |
| * which preserves the upper pte values on 64-bit ptes: |
| */ |
| #define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT) |
| #define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW) |
| #define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER) |
| #define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT) |
| #define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD) |
| #define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED) |
| #define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY) |
| #define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */ |
| #define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */ |
| #define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1) |
| #define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2) |
| #define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3) |
| #define _PAGE_PAT (_AC(1, L)<<_PAGE_BIT_PAT) |
| #define _PAGE_PAT_LARGE (_AC(1, L)<<_PAGE_BIT_PAT_LARGE) |
| |
| #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
| #define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX) |
| #else |
| #define _PAGE_NX 0 |
| #endif |
| |
| /* If _PAGE_PRESENT is clear, we use these: */ |
| #define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, |
| * saved PTE; unset:swap */ |
| #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; |
| pte_present gives true */ |
| |
| #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| _PAGE_ACCESSED | _PAGE_DIRTY) |
| #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ |
| _PAGE_DIRTY) |
| |
| #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) |
| |
| #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
| #define _PAGE_CACHE_WB (0) |
| #define _PAGE_CACHE_WC (_PAGE_PWT) |
| #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) |
| #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) |
| |
| #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
| #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| _PAGE_ACCESSED | _PAGE_NX) |
| |
| #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ |
| _PAGE_USER | _PAGE_ACCESSED) |
| #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| _PAGE_ACCESSED | _PAGE_NX) |
| #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| _PAGE_ACCESSED) |
| #define PAGE_COPY PAGE_COPY_NOEXEC |
| #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| _PAGE_ACCESSED | _PAGE_NX) |
| #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| _PAGE_ACCESSED) |
| |
| #ifdef CONFIG_X86_32 |
| #define _PAGE_KERNEL_EXEC \ |
| (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) |
| #define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX) |
| |
| #ifndef __ASSEMBLY__ |
| extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC; |
| #endif /* __ASSEMBLY__ */ |
| #else |
| #define __PAGE_KERNEL_EXEC \ |
| (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) |
| #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
| #endif |
| |
| #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
| #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
| #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
| #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
| #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
| #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
| #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) |
| #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
| #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| |
| #ifdef CONFIG_X86_32 |
| # define MAKE_GLOBAL(x) __pgprot((x)) |
| #else |
| # define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) |
| #endif |
| |
| #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) |
| #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) |
| #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) |
| #define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX) |
| #define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC) |
| #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) |
| #define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS) |
| #define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE) |
| #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) |
| #define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC) |
| #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) |
| #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
| |
| /* xwr */ |
| #define __P000 PAGE_NONE |
| #define __P001 PAGE_READONLY |
| #define __P010 PAGE_COPY |
| #define __P011 PAGE_COPY |
| #define __P100 PAGE_READONLY_EXEC |
| #define __P101 PAGE_READONLY_EXEC |
| #define __P110 PAGE_COPY_EXEC |
| #define __P111 PAGE_COPY_EXEC |
| |
| #define __S000 PAGE_NONE |
| #define __S001 PAGE_READONLY |
| #define __S010 PAGE_SHARED |
| #define __S011 PAGE_SHARED |
| #define __S100 PAGE_READONLY_EXEC |
| #define __S101 PAGE_READONLY_EXEC |
| #define __S110 PAGE_SHARED_EXEC |
| #define __S111 PAGE_SHARED_EXEC |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * ZERO_PAGE is a global shared page that is always zero: used |
| * for zero-mapped memory areas etc.. |
| */ |
| extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
| #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| |
| extern spinlock_t pgd_lock; |
| extern struct list_head pgd_list; |
| |
| /* |
| * The following only work if pte_present() is true. |
| * Undefined behaviour if not.. |
| */ |
| static inline int pte_dirty(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_DIRTY; |
| } |
| |
| static inline int pte_young(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_ACCESSED; |
| } |
| |
| static inline int pte_write(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_RW; |
| } |
| |
| static inline int pte_file(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_FILE; |
| } |
| |
| static inline int pte_huge(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_PSE; |
| } |
| |
| static inline int pte_global(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_GLOBAL; |
| } |
| |
| static inline int pte_exec(pte_t pte) |
| { |
| return !(pte_val(pte) & _PAGE_NX); |
| } |
| |
| static inline int pmd_large(pmd_t pte) |
| { |
| return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
| (_PAGE_PSE | _PAGE_PRESENT); |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); |
| } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); |
| } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW); |
| } |
| |
| static inline pte_t pte_mkexec(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX); |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| return __pte(pte_val(pte) | _PAGE_DIRTY); |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| return __pte(pte_val(pte) | _PAGE_ACCESSED); |
| } |
| |
| static inline pte_t pte_mkwrite(pte_t pte) |
| { |
| return __pte(pte_val(pte) | _PAGE_RW); |
| } |
| |
| static inline pte_t pte_mkhuge(pte_t pte) |
| { |
| return __pte(pte_val(pte) | _PAGE_PSE); |
| } |
| |
| static inline pte_t pte_clrhuge(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE); |
| } |
| |
| static inline pte_t pte_mkglobal(pte_t pte) |
| { |
| return __pte(pte_val(pte) | _PAGE_GLOBAL); |
| } |
| |
| static inline pte_t pte_clrglobal(pte_t pte) |
| { |
| return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL); |
| } |
| |
| extern pteval_t __supported_pte_mask; |
| |
| static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| { |
| return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| pgprot_val(pgprot)) & __supported_pte_mask); |
| } |
| |
| static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| { |
| return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| pgprot_val(pgprot)) & __supported_pte_mask); |
| } |
| |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pteval_t val = pte_val(pte); |
| |
| /* |
| * Chop off the NX bit (if present), and add the NX portion of |
| * the newprot (if present): |
| */ |
| val &= _PAGE_CHG_MASK & ~_PAGE_NX; |
| val |= pgprot_val(newprot) & __supported_pte_mask; |
| |
| return __pte(val); |
| } |
| |
| #define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX)) |
| |
| #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) |
| |
| #ifndef __ASSEMBLY__ |
| #define __HAVE_PHYS_MEM_ACCESS_PROT |
| struct file; |
| pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| unsigned long size, pgprot_t vma_prot); |
| int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, |
| unsigned long size, pgprot_t *vma_prot); |
| #endif |
| |
| #ifdef CONFIG_PARAVIRT |
| #include <asm/paravirt.h> |
| #else /* !CONFIG_PARAVIRT */ |
| #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
| |
| #define set_pte_present(mm, addr, ptep, pte) \ |
| native_set_pte_present(mm, addr, ptep, pte) |
| #define set_pte_atomic(ptep, pte) \ |
| native_set_pte_atomic(ptep, pte) |
| |
| #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| |
| #ifndef __PAGETABLE_PUD_FOLDED |
| #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| #define pgd_clear(pgd) native_pgd_clear(pgd) |
| #endif |
| |
| #ifndef set_pud |
| # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| #endif |
| |
| #ifndef __PAGETABLE_PMD_FOLDED |
| #define pud_clear(pud) native_pud_clear(pud) |
| #endif |
| |
| #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| #define pmd_clear(pmd) native_pmd_clear(pmd) |
| |
| #define pte_update(mm, addr, ptep) do { } while (0) |
| #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| #endif /* CONFIG_PARAVIRT */ |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #ifdef CONFIG_X86_32 |
| # include "pgtable_32.h" |
| #else |
| # include "pgtable_64.h" |
| #endif |
| |
| #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| |
| #ifndef __ASSEMBLY__ |
| |
| enum { |
| PG_LEVEL_NONE, |
| PG_LEVEL_4K, |
| PG_LEVEL_2M, |
| PG_LEVEL_1G, |
| }; |
| |
| /* |
| * Helper function that returns the kernel pagetable entry controlling |
| * the virtual address 'address'. NULL means no pagetable entry present. |
| * NOTE: the return type is pte_t but if the pmd is PSE then we return it |
| * as a pte too. |
| */ |
| extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
| |
| /* local pte updates need not use xchg for locking */ |
| static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| { |
| pte_t res = *ptep; |
| |
| /* Pure native function needs no input for mm, addr */ |
| native_pte_clear(NULL, 0, ptep); |
| return res; |
| } |
| |
| static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep , pte_t pte) |
| { |
| native_set_pte(ptep, pte); |
| } |
| |
| #ifndef CONFIG_PARAVIRT |
| /* |
| * Rules for using pte_update - it must be called after any PTE update which |
| * has not been done using the set_pte / clear_pte interfaces. It is used by |
| * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| * updates should either be sets, clears, or set_pte_atomic for P->P |
| * transitions, which means this hook should only be called for user PTEs. |
| * This hook implies a P->P protection or access change has taken place, which |
| * requires a subsequent TLB flush. The notification can optionally be delayed |
| * until the TLB flush event by using the pte_update_defer form of the |
| * interface, but care must be taken to assure that the flush happens while |
| * still holding the same page table lock so that the shadow and primary pages |
| * do not become out of sync on SMP. |
| */ |
| #define pte_update(mm, addr, ptep) do { } while (0) |
| #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| #endif |
| |
| /* |
| * We only update the dirty/accessed state if we set |
| * the dirty bit by hand in the kernel, since the hardware |
| * will do the accessed bit for us, and we don't want to |
| * race with other CPU's that might be updating the dirty |
| * bit at the same time. |
| */ |
| #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
| extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep, |
| pte_t entry, int dirty); |
| |
| #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
| extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| unsigned long addr, pte_t *ptep); |
| |
| #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
| extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep); |
| |
| #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
| static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep) |
| { |
| pte_t pte = native_ptep_get_and_clear(ptep); |
| pte_update(mm, addr, ptep); |
| return pte; |
| } |
| |
| #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
| static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep, |
| int full) |
| { |
| pte_t pte; |
| if (full) { |
| /* |
| * Full address destruction in progress; paravirt does not |
| * care about updates and native needs no locking |
| */ |
| pte = native_local_ptep_get_and_clear(ptep); |
| } else { |
| pte = ptep_get_and_clear(mm, addr, ptep); |
| } |
| return pte; |
| } |
| |
| #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
| static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep) |
| { |
| clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
| pte_update(mm, addr, ptep); |
| } |
| |
| /* |
| * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| * |
| * dst - pointer to pgd range anwhere on a pgd page |
| * src - "" |
| * count - the number of pgds to copy. |
| * |
| * dst and src can be on the same page, but the range must not overlap, |
| * and must not cross a page boundary. |
| */ |
| static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| { |
| memcpy(dst, src, count * sizeof(pgd_t)); |
| } |
| |
| |
| #include <asm-generic/pgtable.h> |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_PGTABLE_H */ |